Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Mohammed Reza M. Hashemi"'
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 67:3743-3756
Proximal-field sensing is introduced as an integrated sensing scheme for the in situ characterization of far-field radiation properties of integrated radiators, and the proximal-field radiation sensors (PFRSs) are proposed as the tools to enable this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3363a2906097211dc4b0ffbe4c2f7d26
https://doi.org/10.1109/tmtt.2019.2929154
https://doi.org/10.1109/tmtt.2019.2929154
Autor:
Nina Vaidya, Behrooz Abiri, Christophe Leclerc, Eleftherios Gdoutos, Mohammed Reza M. Hashemi, Harry A. Atwater, Ali Hajimiri, Sergio Pellegrino, Florian Bohn, Austin Fikes, Pilar Espinet, Fabien Royer, Amirreza Safaripour, Michael D. Kelzenberg, Matan Gal-Katziri, Emily L. Warmann
Publikováno v:
Nature Electronics. 2:195-205
Phased arrays are multiple antenna systems capable of forming and steering beams electronically using constructive and destructive interference between sources. They are employed extensively in radar and communication systems but are typically rigid,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::acd26176d4a175a5cbdf7c9ab41155c6
https://doi.org/10.1038/s41928-019-0247-9
https://doi.org/10.1038/s41928-019-0247-9
Autor:
Samuel P. Loke, Philipp Saive, Eleftherios Gdoutos, Christophe Leclerc, Fabien Royer, Behrooz Abiri, Matan Gal-Katziri, Austin Fikes, Ali Naqavi, Michael D. Kelzenberg, Emily C. Warmann, Tatiana A. Roy, Pilar Espinet-Gonzalez, Florian Bohn, Nina Vaidya, Harry A. Atwater, Tatiana G. Vinogradova, Mohammed Reza M. Hashemi, Ali Hajimiri, Sergio Pellegrino
Publikováno v:
2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC).
We have fabricated a functional prototype of an ultralight power converter tile; a modular building block for a space-based solar power system. The tile is $\sim 10\mathrm \times 15$ cm in area, and weighs $\sim 1.5$ kg/$\text{m}^{\mathbf {2}}$. It c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a9563f0b99816a9e1034fdb05f65320d
https://doi.org/10.1109/pvsc.2018.8547403
https://doi.org/10.1109/pvsc.2018.8547403
Autor:
Harry A. Atwater, Nina Vaidya, Pilar Espinet-Gonzalez, Fabien Royer, Florian Bohn, Eleftherios Gdoutos, Mohammed Reza M. Hashemi, Michael D. Kelzenberg, Matan Gal-Katziri, Emily C. Warmann, Behrooz Abiri, Christophe Leclerc, Austin Fikes, Ali Hajimiri, Sergio Pellegrino
Publikováno v:
2018 AIAA Spacecraft Structures Conference.
We demonstrate the development of a prototype lightweight (1.5 kg/m^3) tile structure capable of photovoltaic solar power capture, conversion to radio frequency power, and transmission through antennas. This modular tile can be repeated over an arbit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72987ffe8d27cdbfa61c0211a56bc7f1
https://doi.org/10.2514/6.2018-2202
https://doi.org/10.2514/6.2018-2202
Publikováno v:
2017 IEEE MTT-S International Microwave Symposium (IMS).
Proximal-Field Radiation Sensors (PFRS) are introduced as a new set of tools to enable extraction of far-field radiation properties of integrated antennas from the surface waves inside their dielectric substrates. These sensors allow self-characteriz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a2d00126fd9223ed0ca5a52b76ca875
https://doi.org/10.1109/mwsym.2017.8058871
https://doi.org/10.1109/mwsym.2017.8058871
Publikováno v:
IEEE Transactions on Terahertz Science and Technology. 4:575-581
We present a photoconductive terahertz emitter that incorporates three-dimensional plasmonic contact electrodes to offer record high optical-to-terahertz power conversion efficiencies. By use of three-dimensional plasmonic contact electrodes the majo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03f15016bdf719cce7f070d5737e2936
https://doi.org/10.1109/tthz.2014.2342505
https://doi.org/10.1109/tthz.2014.2342505
Autor:
Christopher W. Berry, Emmanuelle Merced, Nelson Sepúlveda, Mohammed Reza M. Hashemi, Mona Jarrahi
Publikováno v:
Journal of Infrared, Millimeter, and Terahertz Waves. 35:486-492
In this paper we directly measure the refractive index and extinction coefficient of vanadium dioxide (VO2) in W-band (75-110 GHz) near the insulator-to-metal phase transition. A frequency-domain interferometry setup is used to obtain the transmissio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::786a3c9c0a42ea6afe2af5e239431091
https://doi.org/10.1007/s10762-014-0065-0
https://doi.org/10.1007/s10762-014-0065-0
Publikováno v:
Scientific Reports
Engineered metamaterials offer unique functionalities for manipulating the spectral and spatial properties of electromagnetic waves in unconventional ways. Here, we report a novel approach for making reconfigurable metasurfaces capable of deflecting
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fee7c002c3b0aaa5d43c90fba475f00
Publikováno v:
2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz).
We present voltage-controlled millimeter-wave beam-scanning through a fully-integrated vanadium dioxide (VO2) reconfigurable meta-surface. The meta-surface consists of a two-dimensional array of resonant unit-cells with a cross-shape metallic pattern
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9cf5781e546ebbffa7eec1d75ddd0500
https://doi.org/10.1109/irmmw-thz.2016.7758900
https://doi.org/10.1109/irmmw-thz.2016.7758900
Publikováno v:
2016 IEEE MTT-S International Microwave Symposium (IMS).
We present a fully-integrated and electronically-controlled millimeter-wave beam-scanner based on a reconfigurable meta-surface. The meta-surface consists of a two-dimensional array of sub-wavelength cross-shape structures fabricated on a vanadium di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::04c16ca171cfd8eedfbfa56b19950213
https://doi.org/10.1109/mwsym.2016.7540340
https://doi.org/10.1109/mwsym.2016.7540340